1. Use of reflexes (birth-1 month)
- exercise their inborn reflexes and gain some control over them.
2. Primary circular reactions (1-4 months)
- repeat pleasurable behaviors that first occur by chance
3. Secondary Circular reactions (4-8 months)
- More interested in the environment; they repeat actions that bring interesting results
4. Coordination of Secondary Schemes (8-12 months)
- behavior is more deliberate and purposeful as infants coordinate
previously learned schemes
5. Tertiary Circular Reactions (12-18 months)
- toddlers show curiosity and experimentation; they purposefully vary their actions to see results
6. Mental Combinations (18-24 months)
- because toddlers can mentally represent events, they are no longer confined to trial and error to solve problems